Just got 2 days ago, 02038W -color display, with in/out temp/hum. Fun. Outdoor temp too high during day?

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Just got 2 days ago, 02038W -color display, with in/out temp/hum, and forecast/baro/moon. Fun. Hoping? accuracy is correct. My outdoor temp may be 5-10 high during day. Is under overhang, no direct sun. Yesterday was sunny, today is very overcast with interm. rain. Are there possible effects of general thermal radiation, or other radiation? Thinking this prob I have could be because choosing overhang instead of shaded tree. But have multiple analog devices all over,( different brands, inexpensive) and they all read same almost 10 degrees less than this digital sensor 02038W. Indoor next to display are identical and same as thermostat reading. At night outdoor seems alright, just daytime, sun or not. Help!
What is different with 02041? Thanks
Steve in MI.
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steve lahuis

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Posted 2 years ago

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steve lahuis

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Well, I wanted to research this myself. So, from http://www.acurite.com/learn/weather-stations/weather-instruments
under thermometers, I got
"Digital Thermometers with Thermistors: All of AcuRite’s digital thermometers and weather stations measure temperature using a device called a thermistor. Thermistors are thermally sensitive resistors which change in electrical resistance as temperature rises or falls."
So, in my opinion, these thermistors would be relatively impervious to radiated heat (especially indirect radiation, of course).
It's funny getting a new type of weather instrument, and then wondering a while which is correct, the new or the old.
Still will experiment with outdoor placement, and outdoor heat sources. Thanks.
(Edited)
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AcuRite Jennifer

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Hi Steve,

We do recommend putting the sensor in a place that is at least 4 feet above the ground with permanent shade, and plenty of fresh air to circulate around the sensor.  Somethings that can affect the temperature readings are heat sources or vents.  This can be something such as hung in a window or sitting in a window or door frame.   When you are comparing readings, you want to compare to something at the exact same height and location as your sensor. I would recommend moving the sensor, and letting it sit there for a day or two and then comparing the readings after you move the sensor. It might just be the location the sensor is in. You also want to make sure you are following the battery guidelines below.

  • Verify you are using fresh alkaline batteries or lithium batteries (when temperature is below -4oF/-20oC) in sensor.
  • Quality brand batteries are recommended, including Duracell, Rayovac, Energizer, or Kirkland.
  • Verify batteries are fresh. The battery expiration date should be at least 6 years out. Batteries can lose 3% power or more every year in storage.
  • Heavy duty, extra strength or generic / store brand batteries are not recommended for use with AcuRite products because they may cause performance irregularities due to the way these types of batteries disperse power. Each battery should not exceed 1.6 volts.
  • Rechargeable batteries are not recommended for use with AcuRite products because they may cause performance irregularities due to the voltage instability of these types of batteries.
  • Mixing different battery types (brands, old/new, etc.) is not recommended.
If you need further assistance please contact AcuRite Customer Support at 877-221-1252. Thank you. Have a great day!
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steve lahuis

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Thanks for response, Jennifer. I definitely used quality, new alkaline batteries. I think I found one of my analog meters, outdoors, is off. It doesn't jive with 2 other analog meters. This humidity seems to jive. So does baro.
That, and the local forecast might've been off by more than 2 degrees yesterday. So, I got curious.